The levels of nitrates and nitrites in drinking water from two local government areas in Ilorin, Kwara State were determined using HACH DR/EL 5 Spectrnphotometer over a period of four months. The average mean concentr...The levels of nitrates and nitrites in drinking water from two local government areas in Ilorin, Kwara State were determined using HACH DR/EL 5 Spectrnphotometer over a period of four months. The average mean concentration of nitrate （NO3-N） in borehole is 0.185 mg/L and for nitrites （NO2-N） is 0.044 mg/L. The mean concentration in well for the nitrate （NOs-N） is 0.915 mg/L and for nitrites is 0.087 mg/L. The observed means as well as the highest single-point values for both nitrates and nitrites in groundwater are well below WHO （World Health Organisation） MCL （maximum contaminant level） of 10.0 mg/L nitrate as NO3-N and 3.0 mg/L nitrite as NO2-N. The values are also below the NSDWQ＇s （Nigerian Standard for Drinking Water Quality） maximum permitted level of 50 mg/L nitrate as NO3-N and 0.2 mg/L nitrite as NO2-N.展开更多
An empirical research is done on how political Obama＇s 2015 State of the Union Address as the corpora sample speeches adapt to context in the framework of adaptation theory, taking This paper shows that language choi...An empirical research is done on how political Obama＇s 2015 State of the Union Address as the corpora sample speeches adapt to context in the framework of adaptation theory, taking This paper shows that language choices in the State of the Union Address are adaptive to all the levels of the context, including communicative context （language users, mental world, social world, and physical world） and linguistic context. It is confirmed one of the theoretical stances of adaptation theory that there is no language use without being adaptive to context.展开更多
The current study was carried out to examine the heavy metals （Cd, Co, Cr, Cu, Mn, Ni, Pb, Zn and As） concentration in GW （groundwater） samples in the vicinity of distillery spent wash evaporation ponds and RGW （...The current study was carried out to examine the heavy metals （Cd, Co, Cr, Cu, Mn, Ni, Pb, Zn and As） concentration in GW （groundwater） samples in the vicinity of distillery spent wash evaporation ponds and RGW （reference groundwater） samples collected 2 km to 3 km away from the source. The study examines the potential health risk caused by consumption of heavy metals to local inhabitants living around distillery spent wash evaporation ponds. HM （heavy metals） concentration was determined by AAS （atomic absorption） and the results were compared with permissible limits of PEPA （pakistan environmental Protection Agency） and WHO （World Health Organization）, set for industria effluents and drinking water. The health risk assessment such as CDI （chronic daily intake） and HQ （hazard quotient） were determined on the sources ofHM concentration. The cm of heavy metals in GW were found in following decreasing order Fe, Zn, Mn, Ni, Co, Cu, Cr, Cd, Pb and As. The HQ indexes of HM in the GW samples near the distillery spent wash evaporation ponds was in the order As, C, Ni, Cu, Mn, Zn, Pb and Cr. The results showed that the distillery spent wash is the cause for the change in HM contents of the study area.展开更多
文摘The levels of nitrates and nitrites in drinking water from two local government areas in Ilorin, Kwara State were determined using HACH DR/EL 5 Spectrnphotometer over a period of four months. The average mean concentration of nitrate （NO3-N） in borehole is 0.185 mg/L and for nitrites （NO2-N） is 0.044 mg/L. The mean concentration in well for the nitrate （NOs-N） is 0.915 mg/L and for nitrites is 0.087 mg/L. The observed means as well as the highest single-point values for both nitrates and nitrites in groundwater are well below WHO （World Health Organisation） MCL （maximum contaminant level） of 10.0 mg/L nitrate as NO3-N and 3.0 mg/L nitrite as NO2-N. The values are also below the NSDWQ＇s （Nigerian Standard for Drinking Water Quality） maximum permitted level of 50 mg/L nitrate as NO3-N and 0.2 mg/L nitrite as NO2-N.
文摘An empirical research is done on how political Obama＇s 2015 State of the Union Address as the corpora sample speeches adapt to context in the framework of adaptation theory, taking This paper shows that language choices in the State of the Union Address are adaptive to all the levels of the context, including communicative context （language users, mental world, social world, and physical world） and linguistic context. It is confirmed one of the theoretical stances of adaptation theory that there is no language use without being adaptive to context.
文摘The current study was carried out to examine the heavy metals （Cd, Co, Cr, Cu, Mn, Ni, Pb, Zn and As） concentration in GW （groundwater） samples in the vicinity of distillery spent wash evaporation ponds and RGW （reference groundwater） samples collected 2 km to 3 km away from the source. The study examines the potential health risk caused by consumption of heavy metals to local inhabitants living around distillery spent wash evaporation ponds. HM （heavy metals） concentration was determined by AAS （atomic absorption） and the results were compared with permissible limits of PEPA （pakistan environmental Protection Agency） and WHO （World Health Organization）, set for industria effluents and drinking water. The health risk assessment such as CDI （chronic daily intake） and HQ （hazard quotient） were determined on the sources ofHM concentration. The cm of heavy metals in GW were found in following decreasing order Fe, Zn, Mn, Ni, Co, Cu, Cr, Cd, Pb and As. The HQ indexes of HM in the GW samples near the distillery spent wash evaporation ponds was in the order As, C, Ni, Cu, Mn, Zn, Pb and Cr. The results showed that the distillery spent wash is the cause for the change in HM contents of the study area.
